Artificial tooth



(No Model) I ARTIFICIAL TOOTH.

N0. 424,050. Patented Mar, 25, 1890.

UNITED STATES PATENT OFFICE;

GEORGE LENOX CURTIS, OF CHICAGO, ILLINOIS.

ARTlFlCl AL TOOTH.

SPECIFICATIONforming part of Letters Patent No. 424,050, dated March 25, 1890.

Application filed October 26, 1889. Serial No. 328,342. (No model.)

To all whom it may concern:

Be it known that I, GEORGE LENOX OUR'rIs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Artificial Tooth-Crowns; and I do declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in artificial tooth-crowns; and it has for its object to provide a construction which shall present to the eye the appearance of a natural tooth, the gold end of the cap projecting over and protecting the end of the porcelain surface.

Tothe above ends and to such others as the invention may relate the same consists in the peculiarities of construction and in the combination and arrangement of parts, whereby I produce the improved artificial denture, all as more fullyhereinafter described, shown in the drawings, and then particularly pointed out in the appended claim.

The invention is clearly illustrated in the accompanying drawin which, with the letters of reference marked thereon, form a part of this specification, and in which Figure 1 is a perspective View of a structure embodying my invention. Fig. 2 is a vertical section through the same. Fig. 3 is a perspective view of the parts before they are assembled.

The attachment is made by slightly changing the contour of the outer side (or both sides, as the case may be) of the tooth crown or band to receive theporcelain facing and attaching thereto said facingby means of pins baked or otherwise fastened therein, which are soldered from the inside of the band; or said porcelain facing may be held in position by its side edges or a portion thereof being overlapped by the band, or by clamps from the band overlapping the same. The cusps project over the end of this porcelain surface and protect it. By this arrangement I give to the completed structure the appearance of a natural tooth.

On reference to the drawings, wherein the parts are designated by letters of reference, the make-up of the structure will be readily understood. 7

In the said drawings, the letter A designates the tooth-crown, one side of which is formed to receive the porcelain facing, as shown at a, and over this depressed portion is fitted the porcelain surface B, of suitable shape, which surface is provided with the pins or projections 19, baked therein, and these pins are suitably secured in the tooth-crown by being soldered from the inside thereof, as shown.

D is the gold band or crown, which encircles the tooth upon three of its sides and across the cusps, and has its cap or masticating-surface adjacent to the porcelain surface slightly overlapping the same, as shownin Fig. 2. v

The projection of the cap or cusps overlapping the band is deemed important, as it serves to protect the porcelain facing against ,injury in the use of the tooth in mastication,

as will be readily understood.

What I claim to be new, and desire to secure by Letters Patent, is

The combination, with the tooth-crown hav ing one side beveled inwardly from its lower portion upward, and the cap or cusp projecting over the same, as shown, of the porcelain facing fitted to the same, with its upper edge extended beneath and protected by said proj ecting portion of the cusp, and the metal band encircling the tooth upon three of its sides and across the cusp, and a portion extending across and covering the joint between the facing and crown, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE LENOX CURTIS.

Witnesses:

FREDERIC A. PEESO, ELMER B. WHITE. 

